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Kenji Kurokawa
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Tsukuba-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength tunable light source and pulse light source
Patent number
6,870,663
Issue date
Mar 22, 2005
Nippon Telegraph and Telephone Corporation
Masao Kato
G02 - OPTICS
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Patent Grant
Optical fiber
Patent number
5,963,700
Issue date
Oct 5, 1999
Nippon Telegraph & Telephone Corporation
Masao Kato
G02 - OPTICS
Patents Applications
last 30 patents
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Patent Application
Method for manufacturing optical fiber using ultrasonic drill
Publication number
20030136154
Publication date
Jul 24, 2003
Katsusuke Tajima
G02 - OPTICS
Information
Patent Application
Wavelength tunable light source and pulse light source
Publication number
20030043451
Publication date
Mar 6, 2003
Masao Kato
G02 - OPTICS